Calculating-machine.



Gm N I N W 0 R B Gm & N .N A M L L A M J CALCULATING MACHINE. APPLICATION FILED SEPT. 2, 1909.

Patented J an. 3, 1911.

13 SHEETS-BHEET 1.

we -owms runes co.. WASHINCYBN. n, c.

G N I N W. O R B G & N N A M L L A M .J

CALCULATING MAGHINE.

APPLIOATION FILED SEPT. 2, 1909 Patented Jan. 3, 1911.

13 8HEETB-SHEET 2.

1 "mints rs'rzns co., yusnmcwN, o. c

G N I N W O R B Q & N N A M L .L A M .J

CALCULATING MACHINE. LIPLIOATIOR FILED SEPT. 2, 1909.

Patented Jan. 3. 1911.

13 8HEETSSHIIET-3.

J. MALLMANN & G. BROWNING CALCULATING MACHINE.

APPLIOATIOH FILED SEPT. 2, 1909. 980,652.

Patented Jan 3.1911.

1s BHEBTB-SHEET s.

- graaww/z 1m: NORRIS rznzns co, wummnon, a. C4

aw N I N W 0 R B G & N N A M V L L A M L CALCULATING MACHINE. AP PLIUATIOF IILBD SEPT. 2, 1909.

Patented Jan 3, 1911..

oonooo l @gl vemwy:

J. MALLMANVNIF a; G. BROWNING.

GALGULATING MACHINE. APPLIOATIQN rlLpn BEPT. 2, 1909.

Patented Jan. 3, 1911.

13 SHEETS-SHEET 7.

mix Nvvm INC Nam": rznrn cm. wasulncrord. nv c J. MALLMANN 6: G. BROWNING. I

CALCULATING MACHINE.

APPLIOATIOB' FILED EBPT. 2, 1909.

Patented Jan. 3, 1911.

13 SHEETS-SHEET B.

NNN

M @w as 1m: mums PETl'Rh cm, wasumc'ron am N I N W 0 R B G & N N A M L L A M CALCULATING MACHINE. APPLICATION FILED SEPT. 2, 1909 Patented Jan 3, 1911.

mwwww WIIIII/I/I/I/I/I/l/I/IlYl/llI/ll J. MALLMANN & G. BROWNING".

CALCULATING MA GHINE. APPLICATION FILED SEPT. 2,1909.

1 1 9 1 m J d m m a P 0 1, T E E H J 5 T E E K 8 3 1 G N I N W 0 R B R & N N A M L L .A M u GALOULATINGMAOHINB. APPLICATION rnnnsnr'r. 2, 1909.

Patented Jan. 3, 1911.

1n: uumus rrrzns co., uusumamn. n. :4

J. 'MALLMANN & G. BROWNING.

CALCULATING MACHINE. APPLIUATION TILED SEPT. 2, 1909.

Patented Jan.- 3, 1911 13 SHEETS-SHEET 1 3.

m: non-rs r1 nu cm, WASIIINGYDN, a. c.

UNITED STATES PATENT OFFICE.

JAMES MALLMANN, OF SHEBOYGAN, WISCONSIN, AND GEORGE BROWNING, OF OHI- CAGO, ILLINOIS, ASSIGNORS, BY MESNE ASSIGNMENTS, 'I'O STANDARD ADDING MACHINE COMPANY, OF ST. LOUIS, MISSOURI.

GALGULATIN Gr-MACHIN E.

Specification of Letters Patent.

Patented Jan. 3, 1911.

Application filed September 2, 1909. Serial No. 515,889.

To all whom it may concern:

Be it known that we, JAMES MALLMANN, a citizen of the United States, and GEORGE BROWNING, a subject of the King of Great Britain, and residents, respectively, of Sheboygan, in the county of Sheboygan and State of Wisconsin, and of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Calculating-Machines; and we do hereby declare that the following is a full, clear, and exact description thereof.

The general object of our invention is to provide simple, accurate and positive actuating mechanism for accomplishing the various results necessary in each of the operations of a registering and recording calculator.

The present invention being especially designed with reference to improving a calculating machine invented by James Mallmann and for which U. S. Letters-Patent were granted to him December 20, 1904,

In brief the specific objects are as follows: To provide means whereby each calculating-wheel of a total-register-mechanism is actuated by independent stored power in its carrying operation. To convert the oscillatory motion of the powershaft into intermittent rotary motion in one direction, whereby various timed mechanisms are actuated by a series of rotatory cams mounted upon a counter-shaft. To provide a key-controlled eliminating mechanism whereby the register calculatingwheels are held outof engagement with their actuating racks and an item is printed, but is eliminated from said calculatingwheels of the register. To provide means for automatically shifting the position of the carriage in connection with the eliminating mechanism, whereby eliminated items and registered items are alternately .printed side by side or one above the other. To provide a tri-colored ribbon, adapted to be shifted in connection with the eliminating mechanism, whereby the eliminated items are printed in a distinctive color from items registered and recorded. To provide automatic means for reversing the ribbon. To provide a trip-mechanism in connection with the calculating-wheels of the registering-mechanism, whereby the position of the calculating-wheels is controlled with relation to their actuating racks incidental to an addition, total, or sub-total operation. To provide an automatic visible multiply ing indicator, whereby the items registered and recorded will show up to a predetermined number, the indicator being thereafter returned to zero. To provide a totaL mechanism controlled by a movement of the operating-crank of the machine, whereby the tri-colored ribbon is shifted to print a total in a distinctive color from the registered items and the eliminated items, the multiplying indicator in this instance being returned to zero and the keys locked. To provide a key-controlled item-repeat and key-release mechanism, whereby with one movement, items may be duplicated as many times as desired, another movement of the key controlled repeat and release mechanism, being capable of clearing the key-board of depressed keys previous to a printing and registering operation, should an error occur. To provide a key-controlled sub-total mechanism arranged to hold the calculatingwheels of the total-register in mesh with their respective actuating racks during a subtotal printing-operation, the multiplying indicator being at the same time disengaged from its feed-mechanism. To provide a series of hammer-locking bars in connection with the printing-mechanism, whereby only those hammers will be free to print which are to the right of a locking-bar that has been actuated, these locking-bars being only actuated when a digit is to be printed, except the first two bars which are independently actuated by a shift movement of the ribbon, incidental to a total printing operation being made when the machine is. clear, in which case two ciphers would be printed as a clear signal. To provide a simple adjustable paper-feed device and actuating springs for the type-bars, whereby the movement and power of the springs are reduced to the minimum thus increasing their life and efiiciency.

With the above primary and other inci dental objects in view, the invention consists of the various details of construction and l i i combination of parts as will be clearly set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a longitudinal section view of a calculating machine embodying the features of our invention with portions removed and portions broken away to more clearly show certain structural features; Fig. 2, an elevation of the right-hand side of the machine with portions removed and other portions broken away; Fig. 3, a similar elevation of the reverse or left-hand side of same; Fig. 4, a plan sectional view of said machine with parts broken away and other parts removed to avoid confusion in illustration, the view being sectioned upon an approximate plane, as indicated by lines et l of Figs. 1, 2 and 3; Fig. 5, a vertical cross-section of the aforesaid machine, as indicated by line 5-5 of Fig. 1, parts back of the indicator section plane being not shown in order to avoid confusion; Fig. 6, a vertical cross-section of the same, as indicated by line 66 of Fig. 1, with parts removed and other parts back of the indicator section plane not shown to avoid confusion; Fig. 7, an elevation of the extreme rear of the machine, showing the automatic carriage-shift used in connection with the item eliminating mechanism; Fig. 8, a detail plan view of the printing ribbon shift and feed-mechanism, with parts broken away and parts in section to better illustrate the details of construction; Fig. 9, a detail sectional view of the ribbon-shift and feedmechanism, as indicated by line 9-9 of Fig. 8; Fig. 10, a detail section of same, as indicated by line 10-10 of the preceding figure; Fig. 11, a detail elevation of a fragment of the ribbon-shift locking-mechanism, the view being taken looking toward the rear of the machine; Fig. 12, a detail sectional plan view of the ptinting-mechanism, as indi cated by line 12--12 of Fig. 1; Fig. 13, a detail section elevation of the printing-mechanism, as indicated by line 13-13 of Fig. 1; Figs. let, 15, and 16, fragmentary enlarged detail sectional views of the type-carrying plungers and their connections; Fig. 17, a fragmentary plan view of the multiplying item-indicator, with parts broken away and parts in section; Fig. 18, a cross-section of the same; Fig. 19, an inverted plan view of a fragment of the indicator showing one of the indicator-dial return-springs; Fig. 20, a cross-section of said indicator mechanism, the section being indicated by line 20-20 of Fig. 1; Figs. 21 and 22, detail sectional views of one of the paper-feed-rollers and its actuating mechanism; Fig. 23, a top plan view of the key-board mechanism with parts broken away and parts in section to better show the details; Fig. 24, a fragmentary detail of same looking toward the bottom thereof; Fig. 25, an elevation of said keyboard mechanism looking toward the front side thereof; Fig. 26, a detail cross-section of the same, as indicated by line 26-26 of Fig. 25; Fig. 27 a detail plan, wit-h parts broken away and parts in section of the calculating mechanism; Figs. 28, 29, and 30, detail crosssections of the same upon lines 2828, 2929 and 3030 respectively of Fig. 27; Fig. 31, a detail sectional plan view, as indicated by line 3131 of Fig. 30; Fig. 32,-

a detail sectional elevation of the calculating mechanism, as indicated by lines 32-32 of Figs. 28 and 30; Fig. 33, a fragmentary detail elevation of the sub-total mechanism and its various connections, parts being broken away and in section to more clearly illustrate the details; Fig. 34, a detail elevation of the intermittent rotary driving-mechanism for the continuous driven cam-shaft; Fig. 35, a detail view of the actuating cam of the totalregister-loading mechanism; Figs. 36, 37, and 38, similar views of the actuating cams of the paper-carriage shift and item-eliminating mechanism, and Fig. 39, a detail view of the key-release locking-lever.

Referring by characters to the drawings, with especial reference to the first four figures thereof, 1 indicates a base provided with right and left hand standards 2 suitably braced and connected to constitute a frame for the support of the various mechanisms of the machine. The standards are provided with rear guide-ways 3 and forward slots l, into which guide-ways are fitted the ends of rear and forward crossrails 5 and 6 respectively, of a reciprocative sash-frame, the cross-rails of the sash-frame being connected by longitudinal bars 7 and S. The ends of the forward cross-rails 5 eX- tend through the slots 4: and have wristed thereto pitmen 9, the opposite ends of the pitmen being similarly connected to crankarms 10 of a rock-shaft 11 mounted in suitable bearings of the frame-standards. A power-shaft 12 having its bearings also in the frame standards is linked to the rockshaft 11, by means of a spring-controlled telescopically yielding pitman 13, the powershaft being actuated in one direction by a hand-crank 14: mounted thereon and c011- veniently located at the righthand side of the machine. A master coil-spring 15 secured to the rear end of the base is connected to the power-shaft, through a crank-arm 16 secured thereto, the spring being in opposition to the positive crank-power applied to said power-shaft, whereby the same is returned to its normal position by said spring. By the above described mechanism it will be understood that the sash-frame is reciprocative with each complete movement of the handcrank back-and-forth. A series of nine independent type-bars 17 are supported upon the cross-rails of the sash-frame, the typebar-S being, guided and held at their forward ends upon the cross-rails '6, by a spacing comb 18 having t'ecth overlapping the upper Wis compression,

to engage the adjacent edge of the crossrail 6. The heads of the first seven of said type-bars from left to right of the machine are notched to receive a corresponding number of dogs '22, which dogs are oscillatively connected to the machine frame and provided with a pair of contact tails 23 ar ranged in the path of travel of the crossra'il '6, by which rail they are depressed for the purpose of locking the dogs within the notches of the type-bar heads during a total or subtotal operation, to be hereafter more clearly defined.

Fulcrurned upon a rod carried by the base are a series of independent links 24 having slotted heads which engage pins extending from the heads 21 of the type-bars. To these links and near their fulcrum-points are connected spiral-springs 25, which springs have their opposite ends in connec tion with the rear cross-rail 5 of the sashframe. Adjacent its rear end,-each type-bar is provided with a vertically disposed arm 26, to which arm in turn is shackled a typecarrier 27 having a series of type 28 vertically reciprocative therein, there being a spring 29 fitted within the carrier, under and arranged to impinge against lugs 30 extending from the typeshanks, whereby said type are held in their normal position below the printing-plane.

The type-carriers as described, and shown in Fig. 6, each have a rod-extension 27 projecting therefrom, the rods being opposite the shackled or pivoted ends thereof and are provided to constitute supports in connection with a fixed apcrtured plate 27, in which aporturcd plate said rods have sliding-fit. By this construction the type-carriers are self-supported and not dependent upon the type-bars, which type-bars serve as a means for imparting motion to said type-carriers only. Thus undue side-strain is eliminated from said type'bars, which strain would occur should the ty e-carriers be in rigid connection with the type-bars, and each part is consequently self-adjusting in its respective bearing, whercby'friction is eliminated and smoothness in operation is assured.

The type-characters of each type-bar, as best shown in Figs. 1 and 8 of the drawings, comprise a cipher and the digits from 1 to 9 respectively, the characters being normally so postponed that the cipher, which is the rear character, is one space from the printing-line, and hence the typo-bars and type 'car'riers are moved rearward one to ten spaces to effect a printing-operation. This rearward movement of each typebar is effected by its coil-spring 25, when the handcrank is pulled forward to cause a reverse or rear movement of the sash-frame. Thus said sash-frame and type-bars move together until the said type-bars are checked by suitable key-board mechanism or stops. The sash-frame thereafter continues its full rearstroke and is returned to its normal position by the master-spring 15, during which return the various type-bars are picked up and also returned to their normal position,

by the cross-rail 6 coming into contact with the heads of said type-bars. From the fore going described mechanism it will be understood that the actuating coil-springs 25 of the type-bars are relieved of undue tension, which relief is due to the limited travel of said springs in proportion to the travel of the type-bars and saslrframe, owing to the fact that the stroke of the springs is materially shortened by being connected close to the fulcrum-points of the links. Should one or more of the type-bars travel their full stroke in connection with the sash-frame, the coil-springs of these particular bars would only be subjected to the initial tension plus the tension due to the increased distance traveled by the sash-frame, thus proportionately reducing power required to be applied to the hand-crank in moving the sash-frame rearward. Should the rearward movement of a number of the type-bars be only one space, it follows that their coil springs 25 would necessarily be stretched to nearly their full working-tension, in which case said springs act as a supplementary power in conjunction with the master spring to assist the same in performing its function, until such time as the type-bars and sash-frame have assumed their normal positions with relation to each other. Thus the spring-power required to operate these parts is so distributed as to maintain a prac tically normal equilibrium under varying load conditions, and consequently the tension strength of the master-spring is materially decreased, thus eliminating sudden shock and insuring a uniform smooth, lightrunuing machine.

As best shown in Figs. 1, 4L and 5 of the drawings, the key-board mechanism primarily consists of a series of nine springcontrolled keys 26 for each type-bar, the key-shanks being alined therewith and above the same in groups of three. Each group of the key-shanks is spaced aparta distance equal to the space between the type, and are designed, when depressed, to come within the path of travel of any one of three springcontrolled stop'dogs 27 common to the group. Each series of three stop-dogs are pivoted to a type-bar, each stop-dog being too provided with a tail which normally rests upon the lower face of said type-bar, whereby said dogs are locked when opposed by a depressed key-shank should the aforesaid type-barbe moved rearwardly, the dogs being free to swing, if the bar is moved in a reverse direction. This yield of the stopdogs prevents snarling of the parts caused through a partial depression of a key rearward of a stop-dog, whereby the type-bar of the partially depressed key is freed and will move past the key-shank before the same has moveddownward a sufficient distance to stop saidftype-bar, the result of which inadvertent movement would look the aforesaid type-bar and prevent'the same from returning to its normal position, provided the aforesaid key was entirely depressed after the type-bar had escaped.

By spacing the keys apart in groups each having a stop-dog, there is no liability of keys of one group interfering with the stopdog of the next group of keys and, as shown in Figs. 1 and 23, the first stop-dog together with its type-bar is free to move two spaces before looking against the first key, one space being for the purpose of permitting the cipher type to move under the printingline, while the next space brings the digit 1 to the said printing-line. The next key controls alinement for the type digit 2 and the last of the group of keys the digit 3, and so on successively throughout the remaining two groups of keys, each stop-dog being proportionately spaced apart from the first key of the group to perform its function. The last stop-dog of the series is slightly shorter than those preceding so as to prevent said stop-dog from snarling into the middle series of keys, it being understood that the key-shanks corresponding to this short stopdog are proportionately longer than those of the remaining groups in order that the same key-stroke distance may be maintained.

As previously stated the ciphers of all type-bars are normally one space forward of the printing-"line, and with each initial rearward movement of the sash-frame all type-bars move with said frame the distance of one space, and thereby bring the ciphers to the printing-line automatically. In order to stop the bars so as to efiectthis cipher alinement, as best illustrated in Figs. 5, 23 and 25, each series of keys are provided with a bail 28 which bail is pivoted to the front and rear walls of a box-like casing 29 constituting a support for the entire bank of keys, which form part of the key-board mechanism. The rear pivoted end of each bail has a depending finger 3O which finger is arranged to engage and is normally in the path of a horizontally disposed saw-toothed plate 31, the plate being extended to one side of the type-bar and secured thereto. The beveled faces of the plate-teeth are inclined toward the forward end of the ma-- chine, as shown in Fig. 5, for the purpose of allowing the type-bar thereof to return to its normal forward position, said sawtoothed plate slipping over the inclined face of the teeth even though said teeth were engaged'by the bail finger. The intermediate teeth of the plate 31 are provided for engagement with the fingers in order to check the type-bars from being drawn rearward by their springs 25 at the instant when said type-bars are released by the item register mechanism in completing a total or sub-total operation to be described hereafter. As best shown in Figs. 1, 4:, and 5, when the type-bars are at rest, the bail fingers are located one space rearward of the right-angle face of the last tooth of the plate 31, and hence when any or all type-bars are moved rearward they will be checked by this last tooth thus bringing their respective ciphers to the printing-line. Each bail 28 is held against the face of its line of keys by an independent spring 32, each key being provided with a projecting tooth having a beveled face inclined downward and merging into the key-stem just above said bail. The key-shanks are held and guided in bearings formed in the bottom and top walls of the key-board casing 29* and are held in position by means of coil springs which surround said key-shanks. These coil-springs are interposed between the bottom wall of the casing and lugs 34 extending from the key-shanks, which lugs, in connection with similar lugs 35, above the top-wall of said casing, constitute stops to limit the movementof the aforesaid keys in either direction.

Upon the depression of any key in the line above a type-bar, the tooth 33 of the key-shank will cause the bail-finger to swing clear of the saw-toothed plate and the typebar can then be moved rearward until checked by said key-shank, thus the character corresponding to the key depressed will be stopped upon the printing-line of the machine, the depressed key in the meantime being locked down by the bail 28*, which has passed over and engaged the right-angle face of tooth From the foregoing-it follows that, if the operator has depressed the wrong key in the line, the error may be corrected by depressing any other key in th1s line, which depression will cause the bail to again swing outward and permit the coilsnring of the depressed key to restore the same. In order to free depressed keys of the entire bank simultaneously, a universal release-bar 36 is provided, which bar is connected to the ends of corresponding arms of bell cranks 37, 37*, that are fulcrumed to the right and left hand end of the front wall of the key-board casing, the bar being provided with lugs engaging the bails, whereby said bails are rocked in .opposition to their springs when the free arms of either of the bell-cranks 37, 37 are actuated.

To prevent a key being depressed after a .movement of the hand-crank incidental to a printing-operation of an item, the following mechanism is provided: A slidable locking-comb 38, as shown in Figs. 5 and 23 is arranged to be moved under the key-stem lugs 85, the comb being guided and sup;

ported upon the upper wall of the keyboard casing 29, by suitable feet 39. The working edges of the comb are normally clear of the key-stem lugs 35, the said comb being connected to a trigger 40, by bellcranks tl, 42 and a link 43. The trigger 40 is released by atail extension thereof striking a pin 4st, which pin is carried by a camwheel 45, that receives motion, through its connections to be hereinafter described, from the hand-crank. By the above arrangement, it will be understood that the first movement of the hand-crank in a forward direction, as indicated by the dotted arrow in Fig. 3, will cause rotation of the cam wheel 45, in the direction of the arrow as shown in Fig. 2, the cam-pin 4:4 acting to release the trigger. The springs 82 of the bails 28 being connected at their opposite ends to'the comb 38, will then act to draw the working-edge of said comb against the adjacent faces of all key-stems and under their lugs 35, consequently those keys not previously depressed are locked in their normal position.

A release-and-repeat key MS as best shown in Figs. 2, 5 and 23 is pivoted to the right-hand side of the key-board casing, and when manually moved forward, this key releases the entire bank of keys, being connected to the universal release-bar 36 before mentioned, through a lever 47 secured to a shaft 4L8, which shaft passes through bearings in the right and left hand sides of said key-board casing. The forward end of lever -l7 extends over the free arm of the bell-crank 37 while the rear end of the lever has pivoted thereto a. thrustbar 4:9, that in turn is connected to the release-and-repeat key by a link 50, having a slotted end engaging a stud 50 of said release-and-repeat key. The lever 47 is held in normal position against a stoppin 51, by means of a coil-spring 52, another stoppin 53 which projects from said lever, being provided to limit forward movement of the thrust-bar when acted upon by the release and-repeat key. It is obvious from the foregoing, if the release-and-repeat key is moved forward, as indicated by the dotted arrow, link 50 will cause a lift of the lever &7, the free end of which lever will depress the adjacent bellcrank 37 and thereby rock all of the bails 28, so as to simultaneously effect a release of the entire bank of keys, the release-and-repeat key, beingreturned tolits' normal position of rest by the spring-controlled lever 47. It follows that provision must be had for automatic release of the keys after a printingoperation. This is accomplished by a keyrelease lever 54:, which lever for convenience is loosely fulcrumed upon a ribbon-shift shaft 55 mounted in bearin s of the framestandards 1, as best shown in Figs. 2 and 4 of the drawings. One arm of the key-release lever extends rearward and is provided with a foot that extends under the thrust'bar 49, its opposite arm being formed with a nose-extension adapted to be engaged by a spring-controlled latch 56, which latch is pivoted upon a dog 57,1that is also loosely fulcrumed upon the ribbon-shift shaft. When the machine is at rest, the dog 57 is held against a stop-pin 58 by a heavy ten sion s ring 59, the end of said dog being forme with a depending nose which rests upon the low face of the cam-wheel 4.5 and at its junction with the high face thereof, the junction between these surfaces being radially disposed so as to form an abrupt drop. Both the'low and high faces of the cam-wheel 45 are concentrically disposed with relation to the cam-wheel axis, the low face being extended for approximately half of the cam circumference, at which point it gradually rises to the high face thereof. A lug 60 projects from the dog-nose and normally engages a notch of the spring-controlled trigger 40, whereby the latter is locked and through its connection holds the comb 38 clear of the key-stems. The dog 57 being at rest, as shown in Fig. 2, its springcontrolled latch 56 engages a pin 56 carried by the frame-stand and the latch is thus held away from the nosed end of the key-release lever 54, the said key-release lever being engaged by a pin 61 of the said dog, whereby the rear arm of the aforesaid key-release lever is held in contact with the end of the thrust-bar 49. Motion being imparted to the cam-wheel 45 (in the direction as indicated by the arrow) incidental to a recording and printing operation, will cause the pin 4A of said cam-wheel to immediately trip the trigger 4.0, with the result as previously described. There will be no further change of the position of the parts until the dog 57 has been lifted in opposition to its spring 59, by the rise in the cam, at which time the latch 56 being lifted from its seat upon the pin 56 is free to snap over the nosed end of the key-releasing lever, the latter having retained its original position. Just as the machine completes its operation, the abrupt face of the cam-wheel comes to rest and permits spring 59 of the dog to act,

thus seating said dog in its normal position and during this interval, the latch 56 has also drawn down the key-releasing lever 54,

which acticin causes the opposite end of this lever to lift and exert pressure upon the thrust-bar 4:9, to thereby release all keys in a similar manner to that described in connection with a manual release. Owing to the fact that the link 50 is in slotted connection with the release-and-repeat key, the thrust-bar 4:9 is capable of lifting to effect a release independently of the release-andrepeat key. It is obvious that the latch 56 will be freed from the key-release lever 54, by striking its pin 56*, and that owing to the tail-extension of the trigger 40, which is primarily for engagement with the camwheel, the said trigger when released will ride up and rest against the lug 60, in which positlon the trigger-notch will be caught by said lug 60 as the dog rises and thereafter be restored to its normal position.

To prevent a manual release of the keys by the release-and-repeat key l6 after a registering or recording operation has been started, we provide a gravity-controlled locking-dog 62, (see Figs. 2 and 23) which is pivoted to the right-hand side of the easing 29 and has a hooked end that extends over, but is normally clear of a pin 63 carriedby the said releaseand-repeat key. The locklng-dog 62 is held in its position clear of the pin 63 by a tappet 64, which tappet is also pivoted to the casing. This tappet is provided with a pin at one end which engages a notch 65 formed in the locking dog near its pivotal point, the opposite end of said locking-dog being disposed in the path of the travel of one of the crank-arms 10, by which it is operated and held as the said crank-arm assumes its normal forward position of rest. Owing to the fact that motion is imparted immediately to the crank-arms upon starting the machine in operation, it is evident that the tappet 6 1 when relieved of the crank-arm strain will assume a vertical position, caused both through its own gravity and pressure of the gravity-dog 62, due to the inclined face of the notch therein acting upon the tappet-pin. This movement of the tappet consequently permits the hookend of the locking-dog 62 to drop over the pin 63 and thus check any forward motion of the release-and-repeat key until such time as the parts have again assumed their posi tion of rest, as shown in Fig. 2 of the drawings. The release-and-repeat key 46 is also capable of being manually set and locked in a reverse direction from its normal position previously mentioned, whereby any keys which have been depressed for a registering and-printing operation may be held down indefinitely and the amount of the items indicated by said keys repeated as often as desired, thus the release-and-repeat key when moved in a forward direction from its normal position (as indicated by the dotted arrow) constitute a release for the entire bank of keys, and when moved in a reverse direction (as indicated by the arrow in full lines) this key in effect becomes a repeater. In consideration of the various movements of the release-and-repeat key, provision is made whereby the latter isheld in its normal position. accomplished by means of a spring-controlled detent 66, which detent terminates with a curved end that impinges upon :1 lug 67 forming part of the release-and-repeat key, by means of which lug and detent the key may be moved forward and backward under a slight resistance sufficient to hold said key. A V-shaped notch 68 of the detent is provided to receive the lug 67 of the release-and-repeat key, when the latter is swung over to effect a repeating operation, the notch being of sufficient depth to lock the said key in its repeating position. The

throw of the release-and-repeat key is ofsuch distance that its stud 50 will strike the end of the slot in link 50 and thus cause the thrust-bar 49 to swing rearward so as to clear the same from its engaging position with the foot of the key-release lever 5a. The thrust-bar being clear of the releasinglever foot, it is apparent that should the said releasing-lever be actuated by the automatic tripping-mechanism in connection with the cam-wheel 45, the aforesaid lever would not release any depressed keys owing to its disengagement with the thrust-bar through which release of the keys is'efiected.

As best illustrated in Figs. 1, 8, 12, and 13, the printing or recording mechanism consists of a series of independently actuated bell-crank hammers 69 having their heads nested under the printing-line, and also in line with the vertically disposed arms 26 of the type-bars. to which arms the type-carriers 27 are shackled, they being also correspondingly nested, whereby the type 28 and hammers are brought together and conveniently spaced the width of a character apart. The hammers are loosely mounted upon-a rod 70 fixed in brackets 71, which brackets are supported upon the cross-bar 20 of the machine frame and a similar cross-bar 79., the latter being also a component part of the frame. The heads of the hammers which constitute horizontal arms of the bell-cranks are weighted and guided in a suitable combplate 73 connecting the brackets, the opposite arms of the hammers being vertically disposed and are provided with projecting locking-lugs 74, arranged to be opposed by the hammer locking levers 75v These levers are fulcrumed upon a rod carried by the brackets 71 and forward of the hammers, said levers being spaced between the latter and corresponding in number thereto. The forward ends of the hammer-locking levers 75 are similarly spaced between the vertically disposed arms 26 of the type-bars,

As shown in Fig. 2, this is there being lugs '76 projecting from these arms for engagement with beveled faces of the levers 75, which beveled faces are lo cated the distance of one space from said lugs-whenthe type-bars are in their normal position of rest. The hammer-locking levers 7 5 are guided by depending teeth of the comb-plate 7 3 before mentioned, the verti cally disposed arms 26 being similarly guided by a grid 77, that is secured to the brackets 71, front and rear straps of which grid constitute stops for said arms 26 in either direction. Finger-extensions 78 of the hammer-locking levers extend rearward of the hammers, being provided with ends 79, split horizontally and spread apart in opposite directions, the upper split section of each finger being extended to the right and overlapping the lower split section extending to the left of the next finger. The lower split section of the first hammer-locking lever from right to left of the machine, and the upper split section of the next adjacent finger are soldered or otherwise secured. Thus these fingers operate to effect a release of the hammers together, so that if an item in units is printed, the next in higher order or tens hammer locking lever will simultaneously release the printinghammer corresponding thereto and print a cipher indicating the decimal thus .045. The remaining seven hammer-locking levers from right to left are independent of each other, but owing to their overlapped end sections should the last hammer-locking lever be depressed all levers to the right thereof or of lower order would also be depressed and permit the ciphers to be printed, which ciphers are all moved back one space to the printing-line as before stated upon the initial movement of the hand-crank and typebars. This initial ino ement of the typebars of one space to bring the ciphers to their printing-line however has no releasing effect upon the hammer-locking levers, and hence the necessity of the overlapping finger sections whereby the said levers are controlled when only ciphers are to be printed back of the digit. A yoke 80 is loosely mounted upon the ends of rod exterior of the bracket 71, the yoke being provided with a universal rod 81, arranged to engage the vertically disposed arms of the bellcrank hammer and retract the same to the position shown in Fig. 1, against the pres sure of a series of spring-controlled plungers 82, which plungers are reciprocativelv mounted in bearings of a framing carried by the brackets 71; .Oscillative motion is imparted to the yoke 80 by a crank 83 fast on the power-shaft, which crank is in linkconnection with the lower end of said voke. After the hammers have been retracted bv the yoke they are all looked in this positioii by a. universal tripper-plate 84, which is designed to catch under the ends of the vertically disposed bell-crank arms of the hammers. The tripper-plate 8a is pivoted to the forward portion of the brackets 71, being held in its normal locked position against the universal rod 81, by means of a leafspring 85, and depending from said tripperplate is a releasing-arm 86, which arm is adapted to free the printing-mechanism when actuated.

locking lever, causing the same to lift and depress the opposite end thereof. This action frees the hammer controlled by the actuated locking-lever and at the same time the finger at the end of said locking-lever will cause a depression of the two hammer locking levers to the left thereof of lower order, thus the hammers necessary to print the ciphers to the left of the unit, which were locked, are now free to print. The lugs 7 6 of the hammer locking levers, which release the last mentioned hammers for printing digits were stopped at a point just clear of the beveled faces of said locking levers and hence the same were not freed by said lugs. The forward pull of the hand-crank causing power-shaft 12 to rotate therewith and through its connection a forward motion of the yoke 80. The yoke movement carries its universal rod 81 clear of the path of travel of the vertical arms of the bellcrank hammers 69 and at the completion of the forward stroke of the hand-crank, the tripper-plate 84 is withdrawn. The hammers not checked by the hammer lockinglevers 75 are now forced upward by their spring-controlled plungers, their stored power being amplified by momentum causes a quick blow upon the type, the impact thereby lifts said type to effect a printingoperation of the before mentioned item 1.00. A return of the hand-crank to its normal position causes the yoke 80 to restore the hammers which movement also compresses their spring-controlled plungers. At the completion of the yoke-restoring movement, the trippcr-plate will snap back into position, as shown in Fig. 1, due to its spring-pressure.

Referring to Fig. 1, and Figs. 27 to 32 inclusive, the total register-mechanism is supported in a frame comprising parallel 

